Story Preparation Part 2

 This is my quick question before I really making a story prologue :

1. Do you think its okay for me (as this fanfic author) to inserting at least 1 character from Medaka Box to To aru verse?

- if not okay, then i will remove Medaka Box

- if okay, then i will insert Medaka Box character as side character (i wont change this decision)

2. Is it true that Kamijou Touma's personality is problematic?

For number 2 will change my decision about Rimuru Tempest position in To aru verse (Academy city) as Touma sibling or not